heat transfer:The movement of energy from a warmer object to a cooler object. radiation:The transfer of energy through empty space. conduction:Heat transfer by direct contact of particles of matter. convection:Heat transfer by the movement of a heated fluid. density:is the measure of how much mass there is in a volume of a substance. convection currents:is the flow that transfers heat within a fluid
Outline
Radiation
Heat transfer with no direct contact.
An example of Radiation is the heat you feel around a flame or open fire or from the sun.
Conduction
Particles near the heat source vibrate faster as they are heated, so they bump into other particles and heat them too.
An example of conduction is a spoon in a hot pot.
Convection
When a liquid or a gas is heated particles move faster.
Particles spread apart as they move faster
If gas or liquid is cooled, particles move slower and settle closely together.
An example of convection is the bottom of a pot being heated get hot it expands and becomes less dense.
Differences of temperature and density within a fluid cause convection currents.
Table of Contents
Vocabulary
heat transfer:The movement of energy from a warmer object to a cooler object.
radiation:The transfer of energy through empty space.
conduction:Heat transfer by direct contact of particles of matter.
convection:Heat transfer by the movement of a heated fluid.
density:is the measure of how much mass there is in a volume of a substance.
convection currents:is the flow that transfers heat within a fluid
Outline
Radiation
Conduction
Convection
Convection in the earth's mantle